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CVE PROGRAM SOURCE RECORD4.9 Medium

CVE-2026-3116

Improper Input Validation in Zoom Plugin Webhook Handler

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mattermost Mattermost

Default version status: unaffected

  • 0 to ≤ 11.0.4affected
  • 0 to ≤ 11.1.3affected
  • 0 to ≤ 11.3.2affected
  • 0 to ≤ 10.11.11affected
  • 11.5.0unaffected
  • 11.4.1unaffected
  • 11.3.2unaffected
  • 11.2.4unaffected
  • 10.11.12unaffected

References